/*
 * @LastEditors: 七七
 * @Date: 2023-01-05 14:27:54
 */
import React, { Component } from 'react'
import PropTypes from 'prop-types'
import { nanoid } from 'nanoid' // 自动生成id  uuid和nanoid都可以生成唯一的id
import './index.css'

export default class Header extends Component {

  // 对接收的props进行：类型、必要性的限制
  static propTypes = {
    addTodo: PropTypes.func.isRequired,
  }

  // 键盘事件的回调
  handleKeyUp = (event) => {
    // 解构赋值获取target，keyCode
    const { target, keyCode } = event;
    // 判断是否是回车按键
    if (keyCode !== 13) return;
    // 添加的todo名不能为空
    if (target.value.trim() === '') {
      alert('输出不能为空');
      return;
    }
    // console.log(target.value, keyCode);
    //转备好一个todo对象
    const todoObj = { id: nanoid(), name: target.value, done: false };
    // 将todoObj传给props
    this.props.addTodo(todoObj);
    // 清空输入框
    target.value = '';
  }

  render() {
    return (
      <div className="todo-header">
        <input onKeyUp={this.handleKeyUp} type="text" placeholder="请输入你的任务名称，按回车键确认" />
      </div>
    )
  }
}